Selective Synthesis of 1,2-Pentanediols by CoWO4: Catalytic Behaviour of Amorphous versus Crystalline State Siti Hartinah Qurbayni (a*), Yessi Permana (a), Husni Wahyu Wijaya (b)
(a) Institut Teknologi Bandung
*sitihartinahq[at]gmail.com
(b) Universitas Negeri Malang
Abstract
Furfuryl alcohol is one biomass derivatives developed in polymer and pharmaceutical industries. Hydrogenation and decarbonylation of furan rings on furfuryl alcohol were reported to give 1,2-pentanadiol and 1,5-pentanadiol in pressurized hydrogen using platinum group metal catalysts (Ru, Pd, and Pt). Furfuryl alcohol hydrogenations were facilitated by various hydrogen sources, such as such as alcohol or organic acids. Herein, cobalt(II) was used as a catalyst precursor with ethanol, isopropyl alcohol, and methanol as hydrogen sources. The cobalt tungstate was synthesized hydrothermally at relatively lower temperature (<160 C) and relatively shorter time (<10 hours) compared to previously reported procedure (180-200 C, 15-24 hours). This research also evaluated the amorphous phase cobalt tungstate using hydrothermal method. The catalytic ability of cobalt tungstate in crystalline and amorphous phases was observed in the hydrogenation reaction of furfuryl alcohol without hydrogen gas. The synthesized cobalt compounds were characterized using PXRD, FTIR, and EDX. Furfural conversions and products were observed by gas chromatography (GC). In this study, the amorphous phase cobalt tungstate showed better conversion results than the crystalline cobalt tungstate phase.
